Re: HIGH temperature thread sealant.

From: Steve Taylor (steve_at_thetaylorfamily.org.uk)
Date: 02/15/05 

Date: Tue, 15 Feb 2005 17:14:21 +0000

Gregory L. Hansen wrote:

> I'd assumed he's going to 400C for an hour or so to bake out a vacuum
> system, and then would run at room temperature.

Nope, the device runs (intermittently) at upto 1750 C, about 5.5 inches
from the stainless steel parts. The stainless bit is a block around 6"
long and 1" diamteter, with a water cooling system for about 1/3rd of
the length. The temperature of the cooled part is almost ambient.

>
> If it's 400C for sustained use, forget the thread sealants, lose the
> thread, and replace it with conflat, VCR, or some other all-metal bakeable
> fitting.

Still have to join airtight to Boron Nitride,and what will let me do that ?
Thanks
Steve